PHP code example of carllee / line-pay-core-v4

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

carllee / line-pay-core-v4 example snippets

use LinePay\Core\LinePayBaseClient;
use LinePay\Core\Config\LinePayConfig;

class MyLinePayClient extends LinePayBaseClient
{
    public function requestPayment(array $body): array
    {
        return $this->sendRequest('POST', '/v3/payments/request', $body);
    }

    public function confirmPayment(string $transactionId, array $body): array
    {
        return $this->sendRequest(
            'POST',
            "/v3/payments/{$transactionId}/confirm",
            $body
        );
    }
}

// Usage
$config = new LinePayConfig(
    channelId: getenv('LINE_PAY_CHANNEL_ID'),
    channelSecret: getenv('LINE_PAY_CHANNEL_SECRET'),
    env: 'sandbox', // or 'production'
    timeout: 30
);

$client = new MyLinePayClient($config);

use LinePay\Core\LinePayUtils;

// Generate signature for API requests
$signature = LinePayUtils::generateSignature(
    $channelSecret,
    '/v3/payments/request',
    json_encode($requestBody),
    $nonce
);

// Validate transaction ID format (must be 19 digits)
if (LinePayUtils::isValidTransactionId($transactionId)) {
    // Process transaction
}

// Parse callback query parameters
$result = LinePayUtils::parseConfirmQuery($_GET);
// $result['transactionId'], $result['orderId']

use LinePay\Core\LinePayUtils;

// ✓ SECURE: Uses hash_equals() internally (timing-safe)
$isValid = LinePayUtils::verifySignature($secret, $data, $receivedSignature);

// ✗ INSECURE: Never do direct string comparison for signatures
// $isValid = ($expectedSignature === $receivedSignature); // Vulnerable to timing attacks!

use LinePay\Core\Errors\LinePayError;
use LinePay\Core\Errors\LinePayTimeoutError;
use LinePay\Core\Errors\LinePayConfigError;
use LinePay\Core\Errors\LinePayValidationError;

try {
    $response = $client->requestPayment($body);
} catch (LinePayTimeoutError $e) {
    // Handle timeout - IMPORTANT: Check payment status!
    echo "Request timed out after {$e->getTimeout()} seconds";
} catch (LinePayValidationError $e) {
    // Handle validation errors (before API call)
    echo "Invalid input: {$e->getMessage()}";
} catch (LinePayError $e) {
    // Handle API errors
    echo "Error [{$e->getReturnCode()}]: {$e->getReturnMessage()}";
    
    if ($e->isAuthError()) {
        // 1xxx: Check your Channel ID/Secret, or signature generation
        error_log("Auth failed - verify credentials");
    } elseif ($e->isPaymentError()) {
        // 2xxx: Transaction-specific issue (e.g., already refunded)
        notifyUser("Payment could not be processed");
    } elseif ($e->isInternalError()) {
        // 9xxx: LINE Pay server issue - retry with backoff
        scheduleRetry($body);
    }
} catch (LinePayConfigError $e) {
    // Configuration error (missing/invalid credentials)
    echo "Configuration error: {$e->getMessage()}";
}